土方测量中考虑地形要素的方格网法  

Grid Network Method considering Topographical Feature in Earthwork Measurement

作　　者：匡志威 Kuang Zhiwei(Changsha Planning Survey & Investigation & Design Institute,Changsha 410007,China)

机构地区：[1]长沙市规划勘测设计研究院,湖南长沙410007

出　　处：《城市勘测》2021年第3期173-176,共4页Urban Geotechnical Investigation & Surveying

摘　　要：方格网法具备直观、易验算等特点,使用频率高,应用广。但该方法忽略了地形要素信息,地形越复杂,格网长度越大,计算误差越大,计算误差容易超限。针对这一问题,本文提出了考虑地形要素的测量方法,通过将地形要素定义为特征线,建立考虑地形要素的TIN模型,土方计算时考虑地形要素的影响。工程案例分析结果显示,该方法有效地提高了土方测量结果的准确性。The grid method is intuitive,easy to check,frequently used,and widely applicable.However,this method ignores the information of topographical features.The more complex the topography,the larger the grid length,so that the calculation becomes less accurate and the calculation error easily exceeds the desirable threshold.This paper proposes an earthwork measurement method considering topographical features.By defining topographical features as feature lines,this paper establishes a TIN model based on terrain elements,and the influence of topographical features is considered in this earthwork calculation.The results of engineering case analysis show that this method effectively improves the accuracy of earthwork survey results.

关 键 词：方格网法 地形要素 特征线 TIN 

分 类 号：P258[天文地球—测绘科学与技术]